Go to an auto parts store and pick up a couple of ounces of friction modifier and add it to the differential fluid. In theory, you shouldn't have to do this as the Yamaha gear oil already has friction modifiers in it. You may also want to change your differential fluid more often. Check your owner's manual for the recommended change frequency. Please report back as to whether adding additional friction modifier addresses the noise issue.
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Originally Posted by OnInTwo
After changing the transaxle oil with 2 quarts of Yamalube Friction
Modified Shaft Drive Gear Oil SAE 80-90 API Service GL-4, GL-5 the brakes now make noise when pressing hard on them to bring the cart to a stop. The brakes did not make any noise beforehand. I have 18K+ miles on this cart since buying it new from TV. I noticed a very small amount of non metal material in the old oil. Any thoughts or suggestions?
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